I'm a bit of a one-bike-at-a-time person too. Bought one, rode it like crazy, then switched for something new. It's like I fall in bike-love and can't help it.
I've often wondered about folks with 5+ bikes. Like, do they ride all of them equally? Or maybe just one or two get all the action? I mean, is that why people say old bikes last forever? 'Cause they mostly chill in garages, only rolling out for a few hundred miles a year?